Best Cooking Oils for High Heat Frying: A Science-Based Ranking

Why Does Smoke Point Matter for Cooking?

The smoke point of a cooking oil is the temperature at which it begins to break down and produce visible smoke. When oil exceeds its smoke point, it generates harmful compounds including aldehydes, acrolein, and free radicals. These compounds not only ruin the flavour of your food but may also pose health risks with repeated exposure.

For high-heat cooking methods like deep frying (175-190°C), stir-frying (200°C+), and searing (230°C+), you need a fat with a high smoke point and good oxidative stability. However, smoke point alone doesn't tell the full story — a fat's chemical stability under heat is equally important.

How Are Cooking Oils Ranked for High Heat?

Here's how common cooking fats compare for high-heat cooking, ranked by both smoke point and oxidative stability:

1. Beef Tallow — 250°C (480°F): The top choice for high-heat frying. Beef tallow has an excellent smoke point and exceptional oxidative stability because it's primarily composed of saturated and monounsaturated fats, which resist heat-induced breakdown. Grass-fed tallow also provides fat-soluble vitamins A, D, E, and K. Our Organic Grass-Fed Beef Tallow is ideal for all high-heat cooking.

2. Ghee (Clarified Butter) — 250°C (480°F): Ghee matches tallow's smoke point and has good stability. It's essentially butter with the milk solids removed, which are what cause regular butter to burn at lower temperatures. Ghee adds a nutty, rich flavour to dishes.

3. Avocado Oil — 270°C (520°F): The highest smoke point of any cooking oil. However, a 2024 study found that 82% of avocado oils tested were either rancid or adulterated with cheaper oils. If you can find a genuine, high-quality avocado oil, it's excellent for high heat. The authenticity problem makes it less reliable than animal fats.

4. Coconut Oil (Refined) — 230°C (445°F): Good oxidative stability due to its high saturated fat content. The refined version has a higher smoke point than virgin coconut oil (175°C). Adds a subtle coconut flavour that works well in some dishes but not all.

5. Extra Virgin Olive Oil — 190-210°C (375-410°F): Despite its moderate smoke point, EVOO is surprisingly stable at cooking temperatures due to its antioxidant content. A 2018 Australian study found it was actually more stable than many oils with higher smoke points. Best for medium-heat cooking like sautéing rather than deep frying.

Which Oils Should You Avoid for High Heat Cooking?

Polyunsaturated seed oils — including soybean oil, canola oil, corn oil, sunflower oil, and grapeseed oil — are the worst choices for high-heat cooking despite being heavily marketed for this purpose. Their high polyunsaturated fat content makes them chemically unstable at frying temperatures, producing high levels of aldehydes and other oxidation products.

A landmark 2019 study published in Acta Scientific Nutritional Health found that when heated repeatedly, seed oils generated aldehyde levels 20 times higher than the World Health Organisation's safety limits. Saturated and monounsaturated fats like tallow and ghee produced significantly fewer harmful compounds under the same conditions.

What Makes Beef Tallow the Best Choice for Frying?

Beef tallow combines the ideal properties for high-heat cooking: a smoke point well above standard frying temperatures, excellent oxidative stability from its saturated fat content, natural flavour enhancement, reusability (it can be strained and reused 3-5 times), and cost-effectiveness for bulk frying. For commercial or heavy home use, our Tallow 15KG bulk pack provides the most economical option.

Frequently Asked Questions

Is a higher smoke point always better?

No. Smoke point is important but oxidative stability matters more. An oil can have a high smoke point but still produce harmful compounds at cooking temperatures if it's chemically unstable. Beef tallow and ghee excel at both metrics, which is why they're the top recommendations for high-heat cooking.

Can I use olive oil for frying?

Extra virgin olive oil is suitable for light frying and sautéing at temperatures below 200°C. For deep frying at higher temperatures, beef tallow or ghee are better choices. Don't waste expensive EVOO in a deep fryer — save it for salad dressings and finishing dishes.

Why is canola oil so popular if it's not ideal for frying?

Canola oil is popular because it's inexpensive to produce and was heavily promoted by agricultural interests. Its neutral flavour and low cost made it attractive for food manufacturers and restaurants. However, its high polyunsaturated fat content makes it a poor choice for high-heat cooking from a chemical stability perspective.